Hair-waving solution



Patented July 17, 1928.

UNITED STATES PATENT OFFICE.

I'BAINK J. MOKENNA, OF NEW YORK, N. Y., ASSIGNOR TO CHEMICALPBIHABATTONS, INC., 01 NEW YORK, N. Y., A CORPORATION OF NEW YORK.

HAIR-WAVING SOLUTION.

No Drawing.

.This invention relates'to a new composition of matter in the form of asolution expressly adapted for permanent waving of human hair.

5 The invention has reference to a. solution comprising four partshydrazine hydroxide by weight and ninety-six parts of water, by weight.

Solutions of this character are applied to I the hair directly or to apad, or to both, the

saturated pad being wound around the hair and then heated for abouteight minutes in an electric heater such as is need generally in'permanent waving machines, or apparati.

Hydra-zine hydroxide NH NH OH or the dihydroxide NH OH.NH OH is superiorto the metal bases ordinarily employed in thathit is slightly volatilewhen heated and penetrates to all of the hair wound on the curler.

" thereby thoroughly softening it. It is submitted that it is superiorto ammonium hydroxide because it is not so volatile and has no offensiveodor.

Moreover, when ammonia solution is '2 heated, the ammonia gas is sovolatile that Application filed March 26, 1928. Serial No. 264,961.

of hair by the use of an amino compound is in my opinion entirely new.

The use of the radical NH is distinctly o superior to any method now orheretof re in use and is also superior to any compound composed ofammonia or any other alkaline hydroxide or salt.

I find that the most suitable of the amino compounds for the purpose ofpermanently wavin or curling hair is hydrazine hydroxi e'or hydrazinedihydroxide.

Having thus described my invention, what I claim as new is 1. As a newproduct of manufacture, a solution for the curling or permanent wavingof hair containing four parts hydrazine hydroxide NH NH OH by weight andninety-six parts water by weight.

2. As a new product ofmanufacture', a solution for the curling orpermanent waving of hair containing hydrazine hydroxide (NH NH OH) andwater Within the limits or range of ei ht parts b weight hydrazine 00hydroxide (lH NH oI-f and ninety-two parts b weight of water and twoparts by weight ydrazine hydroxide (NH NH 'OH), and ninety-eight partsby weight of water.

3. A method of waving hair consisting of wetting a strand of hair with asolution consisting or composed-0f four parts hydrazine hydroxide (NH NHOH), by weight and ninety-six parts water 'by weight, winding the strandto form a curl and subjecting the curl to an application of heat.

In testimony whereof I aflix my signature.

FRANK J. MoKENNA.

